4gb Sandisk SD Card(ready boost compatible) Wanted

earlier this year ,I installed a genuine copy of MS Vista. It ran slowly - perhaps because its vista, perhaps because of some of my apps. it also took over 120gb of a 160gb hard disk(I was dualbooting with xp) eventually, i formatted and reinstalled.

SP1 is out, i've upgraded my ram to 3gb, my harddisk to 320gb, so i'm looking to try again.

it appears that you can boost vista performance with a feature called readyboost - which works with flash memory. it worked with my LG flash drive, but i don't like the idea of sticking a flash drive permanently into my laptop (unless i can find a very short one) . if i'm packing up in a hurry, it might catch on something. . .

then i found that readyboost also works with SD cards. however, it doesn't work with all SD cards, (it didn't work with my LG SD card) the maximum size of card is 4gb. it seems sandisk cards are compatible, so i'm looking to buy a 4gb sandisk SD card. if anyone knows of another compatible model, i'm interested.

( i have scoured the net, and i found a compatible 4gb sd card for $16 on amazon - i'm just pointing this out before some peeps hit me with outrgaeous N11,500 costs - someone just did. i have found that pc village/most nigerian pc vendors  quite simply are daylight robbers - 2gb of ram goes for n25000 at pc village , and i bought the same(brand new)  for roughly n6000 on ebay.

_{(just so the more vulpine sellers don't try' johnny just come' on me}